16155765964801 has 16 divisors (see below), whose sum is σ = 16657868265984. Its totient is φ = 15657125961024.

The previous prime is 16155765964771. The next prime is 16155765964861. The reversal of 16155765964801 is 10846956755161.

It is a cyclic number.

It is not a de Polignac number, because 16155765964801 - 2⁷ = 16155765964673 is a prime.

It is a super-2 number, since 2×16155765964801² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16155765964861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70406011 + ... + 70635103.

It is an arithmetic number, because the mean of its divisors is an integer number (1041116766624).

Almost surely, 2^{16155765964801} is an apocalyptic number.

It is an amenable number.

16155765964801 is a deficient number, since it is larger than the sum of its proper divisors (502102301183).

16155765964801 is a wasteful number, since it uses less digits than its factorization.

16155765964801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236640.

The product of its (nonzero) digits is 54432000, while the sum is 64.

The spelling of 16155765964801 in words is "sixteen trillion, one hundred fifty-five billion, seven hundred sixty-five million, nine hundred sixty-four thousand, eight hundred one".